Pump.



PATENTED OCT, 6, 1903,

am 9 no 0 4 7 G. W. MEYER.

PUMP. uruonmu FILED JUNE 2, 1902.

H0 MODEL.

RMNI Arron/En.

'UNlTED STATES Patented October 6, 19012.

PATENTWQFFICE;

PUMP.

SPEGIFIGATION forming part of Letters Patent No. 740,892, dated October 6, 1903.

Application filed June 2,1902. Serial No. 109,887. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. MEYER, a

citizen of the United States, and a resident of This invention relates to a duplex pump adaptable to all ordinary purposes, but especially adapted for use in places which are confined and otherwise difficult of access. It

may be operated by any fluid under pressure;

but compressed air is thought to be most effective.

The invention involves certain features of construction and combinations of parts,which willfully appear hereinafter.

This specification is an exact description of one example of my invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal section of the invention. Fig. 2 is a cross-section on' the line 2 2 of Fig. 1. Fig. 3is an inner side elevation of one of the cylinder-heads; and Fig. dis an enlarged fragmentary section on the line 4. 4 of Fig. 2-, especially illustrating the Valve.

Two cylinders are provided, these cylinders being in longitudinal alin'ement and being rigidly connected together by a box 12, which is fastened to them. The box 12 is formed in its interior with an exhaust-chamber 14 and a valve-chamber 15, the valvechamber communicating with the exhaustchamber by ports 16, and the exhaust-chamber communicating with the atmosphere by ports 17.

18 iudicatesa motive-fluid feed-pipe which passes into the valve-chamber. The valve is of duplex form and comprises a main part or diaphragm 19, from each side of which project the tubular valves proper, 20. The main part or diaphragm 19 has limited movement in an enlarged portion 21 in the valve-chamher, and said tubular extensions or valves proper, 20, are perforated, as indicated at 22, so as to permit the steam to pass from said enlarged portion 21 in the valve-chamber into the interior of each tubular extension, according to the position of the valve, and also to permit the exhaust fluid from the cylinders to pass from the interior of said tubular extensions into the exhaust-ports 16, communieating with the exhaust-chamber 14. In each cylinder works a piston 23,'these pistons being connected by a rod 24 to move in ,unison and said rod passing centrally through a stuffing-loox 25, formed in the box 12. The motive fluid being continually under pressure in the pipe 18, as the left-hand piston strikes the valve it throws it into the position shown in Figs. 1 and 4:. This places the left-hand ports 22 in communication with the left-hand ports 16, and the fluid in the right-hand cyliuder may then be exhausted through the tu-' bular extension 20,'p0rts 16,exhaust-chamher 14, and exhaust-port's '17. Also the motive fluid in the pipe 18 may pass from the enlargement 21 of the valve-chamber through the left-hand extension of the valve and into engagement with the left-hand piston, forcing it through the corresponding cylinder.

At each outer end of the cylinders 10 heads 26 are provided. These heads are securely fastened to the respective cylinders and have inlet-ports 27 and outlet-ports 28. They are also constructed with valve chambers 29, whose internal diameters are slightly greater than the internal diameters of the cylinders 10. In each of these chambers 29 cup-valves 30 are arranged, and these valves have movement axially of the cylinders, such movement being confined at the outer limit by the walls of the heads 26 and at the inward limit by the outer extremities of the cylinders 10. Studs 31 are fastened in the cylinder-heads 26 and project into casings 32, formed in the valves 30, and expansive springs 33 are arranged in these casings and guided by said studs, such springs tending normally to throw the valves into the position shown at the left-hand extremity in Fig. 1 Each valve 30 is formed with ports 34, and these ports are commanded by auxiliary valves 35, which are in the form of disks or plates fitted to slide axially on the casings 32. Springs 36 are provided, said springs tending normally to seat the auxiliary valves against the main valves 30 and close the ports 34.

When the main and auxiliary valves 30 and 35 are in the position shown at the left-hand end of Fig. l, the fluid being pumped is being drawn through said valves into the lefthand cylinder, and when said valves are in the position shown at the right-hand end of Fig. l the fluid being pumped is being forced from the right-hand cylinderout through the outlet 28 of the left-hand head 26. Assum ing, therefore, that the parts are in the position shown in Fig. 1, the fluid-pressure will act on the left-hand piston 23, and the fluidpressure previously introduced into the righthand cylinder 10 will be exhausted. Both pistons will move to the left and the lefthand main and auxiliary valves will both seatthat is to say, they will each assume the limit of theiroutward movementand the left-hand outer port 28 will then be opened, permitting the left-hand piston to force the fluid out from the left-hand cylinder. Simultaneously the right-hand main and auxiliary valves will shift from the position shown in the drawings and will close the outlet 28 at the right-hand end of the pump, opening the inlet 27 at said end and permitting the righthand cylinder to fill with the fluid being pumped. WVhen the right-hand piston strikes the motive-fluid valve, it causes it to move from the position shown in Figs. 1 and 4 to the extreme position in the other direction, and the above-described operation will be repeated.

Various changes in the form and details of my invention may be resorted to at will without departing from the spiritof myinvention. Hence I consider myself entitled to all forms of the invention as may lie within the intent of my claims.

'Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of two axially-alined cylinders, a box connecting the contiguous ends thereof, said box having an exhaustchamber communicating with the atmosphere and a valve-chamber communicating with the exhaust-chamber, said communication of the valve-chamber with the exhaust-chamber being formed by two ports located at different points along the longitudinal axis of the valve-chamber and said valve-chamber having an enlarged portion intermediate said ports thereof, a valve comprising a main or enlarged portion adapted to move in the said enlarged portion of the valve-chamber and the valve also comprising tubular extensions respectively opening into the cylinders, said extensions being perforated at points inward toward the main or enlarged portion of the valves, means for supplying a motive fluid to the said enlarged portion of the valve-chamber, and connected pistons working respectively in the cylinders and adapted to strike alternately the said tubular projections of the valve, whereby to shift the valves.

2. The combination of two cylinders axially alined, a box connecting the contiguous ends thereof, said box comprising a valve-chamber the ends of which open respectively into the cylinders and said boxalso comprising two exhaust-ports'passing from the valve-chamber at different points along the longitudinal axis thereof, a valve having a limited movement in the valve-chamber and comprising a solid central portion and oppositely-directed tubular extensions respectively opening into the cylinders, said tubular extensions being perforated at points inward toward the cen-' tral portion of the valve, for the purpose specified, means for leading the motive fluid into the valve-chamber at a point intermediate the said exhaust-ports, and connected pistons working in the cylinders.

3. The combination of two cylinders axially alined, a box connecting thecontiguous ends thereof, said boxcom prising a valve-chamber the ends of which open respectively into the cylinders and said box also comprising two exhaust-ports passing from the valve-chamber at different points along the longitudinal axis thereof, a valve having limited movement in the valve-chamber and comprising a solid central portion and oppositely-directed tubular extensions respectively opening into the cylinders, said tubular extensions being perforated at points inward toward the central portion of the valve, for the purpose specified, means for leading the motive fluid into the valve-chamber at a point intermediate the said exhaust-ports, and connected pistons working in the cylinders, said valve being arranged to project alternately into the cylinders so as to be struck by the piston, whereby to operate the valve.

4. The combination of two cylinders axially alined,.a box connecting the contiguous ends thereof, said box comprising a valve-chamber, the ends of which open respectively into the cylinders, and said box also comprising two exhaust-ports passing from the valve-chamber at different points along the longitudinal axis thereof, a valve having limited movement in the valve-chamber and comprisinga solid central portion and oppositely-directed tubular extensions respectively opening into the cylinders, said tubular extensions being perforated at points inward toward the central portion of the valve, for the purpose specified, means for leading the motive fluid into the valve-chamber at a point intermediate the said exhaust-ports, connected pistons working in the cylinders, a head at the outer end of each cylinder, said heads each having inlet and outlet orifices, and valve devices commanding said orifices.

5. A pump, comprising two cylinders, a box connecting the two and having an exhaustchamber communicating with the atmosphere and also having a valve-chamber communieating with the source of motive fluid and communicating with the exhaust-chamber by two ports, a valve in the valve-chamber and comprising two portions respectively communicating with said ports to the exhaustchamber and also respectively communicat ing with the cylinders, connected pistons working in the cylinders, and means for controlling the inlet and outlet of fluid to and from the cylinders.

6. A pump, comprising two cylinders, a box connecting the two and having an exhaustchamber communicating with the atmosphere and also having a valve-chamber communieating with the source of motive fluid and communicating with the exhaust-chamber by two ports, a valve in the valve-chamber and comprising two portions respectively com m unicating with said ports to the exhaust-cham her and also respectively communicating with the cylinders, connected pistons working in the cylinders, and means for controlling the inlet and outlet of fluid to and'from the cylinders, the end portions of the valve being projected beyond the box so as to be alternately struck by the pistons to be moved thereby.

7. A pump, comprising two cylinders, a box connecting the two and having an exhaust chamber communicating with the atmosphere and also having a valve-chamber communicating with the source of motive fluid and communicating with the exhaust-chamber by two ports, a valve in the valve-chamber and comprising two portions respectively communicating with said ports and also respectively communicating with the cylinders, connected pistons working in the cylinders, and means for controlling the inlet and outlet of fluid to and from the cylinders, the said valvechamber of the box having an intermediatelylocated interior enlargement with which said source of motive fluid communicates and the valve having an enlarged middle portion located in the enlargement of the valve-chamber to limit the movement of the valve.

8. A pump, comprising two cylinders, connected pistons working respectively in said cylinders, a box connecting said cylinders and having feed and exhaust passages therein, the

box also having a valve-chamber with which said feed and exhaust passages communicate, and a valve placed in said chamber and controlling the feed and exhaust passages, the ends of the valve being projected beyond the box into the respective cylinders so as to be struck by the pistons, whereby to throw the valve from one position to the other.

sides of the feed-port, a valve mounted in the valve-chamber and comprising two portions respectively communicating with the cylinders and having orifices serving to place its two portions in communication with the respective feed and exhaust ports and also in alternate communication with the feed-port, I

according to the movement of the valve, connecting-pistons working in the cylinders, and

means for controlling the inlet and outlet of fluid being pumped toand from the cylinders.

10. Apump,comprising twocylinders,a box connecting the two and having a valve-chamber therein and also having a feed-port leading to the valve-chamber and exhaust-ports leading from the valve-chamber on opposite sides of the feed-port, a valve mounted in the valve-chamber and comprising two portions respectively communicating with the cylinders and having orifices serving to place its two portions in communication with the respective feed and exhaust ports and also in alternate communication with the feed-ports according to the movement of the valve, connecting-pistons working in the cylinders, and means for controlling the inlet and outlet of fluid being pumped to and from the cylinders, the end portions of said valve being projected beyond the respective ends of the box in position to be struck by the respective pistons, whereby to operate the valve.

11. A pump, comprising a'cylinder, a piston mounted therein, a box located at one end of the cylinder, said box having feed and exhaust passages therein, a valve controlling said passages and movable into the cylinder to be struck by the piston, whereby automatically to operate the valve, and means at the other end of the cylinder to control the inlet and outlet of fluid.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

GEORGE W. MEYER.

Witnesses:

J OSEPH T. ll/IARTIN, CHARLES L. REED. 

